Complex because a complex sentence has 1+ fragments of a sentence, and 1+ complete ideas
(B) The people of the town were amused by their new loony's unusual appearance and seemed to take delight in his performance on the minibus.
This is the best summary of the ideas of the passage, because transforming into the loony and the experiences that follow are all collected in this statement.
The correct answer to the question that is being stated above would be the phrase 'context clues'. Figuring out the definition by using the words used around 'malleable' is a very great example of using context clues to know what the word means.